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Even more below there is the bottom of the sub which is a true navy blue sub with transparent windows which show the bloontonium inside, and has darker blue fins. Below there is a blue lid that when submerged shows the interior, which is liquid bloontonium. These cannons have a lid that is white on the inside and blue on the outside. On the top right and left there are missile cannons that each are a black rectangle with two holes for the missiles. When submerged these guns are closed by a white lid. The guns are three black cannons that come out of a hole. Around the yellow stripe there is a white stripe that goes around the gun's yellow border. The border of the top is yellow with a vertical yellow stripe that goes down the entire sub and around the guns.
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The Nautic Siege Core is a navy blue sub. Nautic Siege Core and all three Tier 5 Monkey Subs To max out on manual cash sacrifices, the player must spend at least $1,020,000 on Easy, $1,200,000 on Medium, $1,296,000 on Hard, and $1,440,000 on Impoppable. Additionally, the Nautic Siege Core is unobtainable in Sandbox Mode until it has been created in a real game, but can be created in Challenge Editor. As with all Paragons, the Nautic Siege Core cannot receive buffs from any external sources (aside from the bloon debuffing status effects of Cripple MOAB, Glue Storm, and Super Brittle), with exception of Navarch of the Seas and the " Paragon of Power" Monkey Knowledge. The Degree of the Nautic Siege Core ranges from 1-100 and is determined by total cost, pop count, upgrades, and number of Monkey Subs sacrificed as explained here. The Nautic Siege Core is obtained by having one of each tier 5 Monkey Sub and purchasing the Paragon upgrade, which subsequently consumes all Monkey Subs on screen. It combines major features from the Energizer, Pre-Emptive Strike and Sub Commander. The Nautic Siege Core is the Paragon of the Monkey Sub, added in Update 41.0, making the Monkey Sub the third Military Monkey to possess a Paragon. Unfathomable range, power, and synergies with all other Monkey Towers and Heroes put all Bloons under assault.